|
Prior probability (odds): |
18% (0.2) |
|
POSITIVE TEST: |
Positive Likelihood ratio: |
8.70 |
95% confidence interval: |
[5.65,13] |
Posterior probability (odds): |
66% (1.9) |
95% confidence interval: |
[55%,74%] |
(~ 1 in 1.5 with positive test |
are sick) |
|
NEGATIVE TEST: |
Negative Likelihood ratio: |
0.24 |
95% confidence interval: |
[0.14,0.40] |
Posterior probability (odds): |
5% (0.1) |
95% confidence interval: |
[3%,8%] |
(~ 1 in 1.1 with negative test |
are well) |
|
Odds = Probability / (1-Probability) |
+LR = Sensitivity / (1 - Specificity) |
-LR = (1 - Sensitivity) / Specificity |
Posterior Odds = Prior Odds x LR |
|